Collar bomb case

[Shadow Beast]

Would it be so quick that the victim would not even be able to register the sound or the pressure wave?

i.e. it would be a case of fully conscious and then dead before you know anything about it?

 

Yeah basically, the detonation cord in the system, burns at a rate of between 7000-8000 meters/second, (18,000mph) British stuff is a little quicker:d the punch that delivers to the main charge is instantaneous when it goes off, your right in the pressure wave before the flame would rip you apart, safe to say you would not know a thing, especially in the case here because he did not know when it would detonate.